When a Korean clause modifies a noun — "the rice I ate," "the café we used to go to" — the tense and aspect of that modifier is carried entirely by the adnominal (attributive) ending glued to the verb. English marks this contrast on the verb itself ("the rice I ate" vs "the rice I was eating"); Korean makes exactly the same cut, but it makes it on the ending. This page pits the two past adnominals against each other: -던, built on the retrospective -더-, and the plain completed -(으)ㄴ. Getting the choice right is one of the cleaner intermediate wins in Korean, because the distinction maps almost perfectly onto an aspectual contrast you already feel in English.
The core split: completed vs recalled-as-ongoing
Reduce it to one sentence and it never leaves you: -(으)ㄴ says the action was finished; -던 says you witnessed it in progress, habitually, or left unfinished.
- -(으)ㄴ = completed past. The event happened and is done. 먹은 밥 = "the rice I ate (all of it)."
- -던 = retrospective imperfective. You personally recall the action as ongoing, repeated over time, or interrupted. 먹던 밥 = "the rice I was (in the middle of) eating."
Because -던 carries the -더- morpheme, it also inherits its firsthand-witness flavor: -던 describes something you yourself saw, did, or experienced, not a fact you merely know about.
다 마신 커피 잔은 여기 두세요.
da masin keopi janeun yeogi duseyo
Put the coffee cups you've finished (drinking) over here.
마시던 커피는 그대로 두세요.
masideon keopineun geudaero duseyo
Leave the coffee you were (still) drinking as it is.
Same verb, 마시다, same noun, 커피 — but 마신 커피 is an emptied cup and 마시던 커피 is a half-drunk one you set down. That single pair is the whole lesson in miniature.
-던 in its three senses
Interrupted / unfinished
The most vivid use of -던: an action caught mid-stream and abandoned. The thing is still there, still unfinished.
아까 마시던 커피 어디 있어요?
akka masideon keopi eodi isseoyo?
Where's the coffee I was drinking a moment ago?
내가 쓰던 방을 동생이 쓰게 됐어요.
naega sseudeon bang-eul dongsaeng-i sseuge dwaesseoyo
My younger sibling ended up taking the room I used to use.
Habitual / "used to"
-던 also covers a repeated past habit — the English "used to" that describes a routine you no longer keep.
우리가 자주 가던 카페가 문을 닫았어요.
uriga jaju gadeon kapega muneul dadasseoyo
The café we used to go to a lot has closed down.
어릴 때 자주 부르던 노래예요.
eoril ttae jaju bureudeon noraeyeyo
It's a song I often used to sing as a kid.
-(으)ㄴ: the completed past adnominal
Plain -(으)ㄴ presents the action as a finished whole. Its allomorphy is the standard one for verb attributives:
- Stem ends in a vowel or ㄹ → -ㄴ: 가다 → 간, 만들다 → 만든 (the ㄹ drops before ㄴ).
- Stem ends in a consonant → -은: 먹다 → 먹은, 읽다 → 읽은.
-던, by contrast, attaches uniformly to any stem with no allomorphy at all: 가던, 만들던, 먹던, 읽던.
어제 읽은 책 진짜 재미있었어요.
eoje ilgeun chaek jinjja jaemi-isseosseoyo
The book I read yesterday was really fun.
어제 만든 김치찌개 아직 남았어요?
eoje mandeun gimchijjigae ajik namasseoyo?
Is there any of the kimchi stew I made yesterday left?
Both events are complete: the book was finished, the stew was fully made. Swap in -던 (읽던 책, 만들던 찌개) and you would be saying you were in the middle of reading it, or in the process of making it and stopped.
The three-way picture: 먹은 · 먹던 · 먹었던
There is a third form, -았/었던, that layers the completed past marker -았/었- under -던. It marks an event that was completed but is now distinctly recalled — often as discontinued, no longer the case. Line up all three and the system is clear:
| Form | Reading | Meaning |
|---|---|---|
| 먹은 밥 | meogeun bap | the rice I ate (completed, neutral) |
| 먹던 밥 | meokdeon bap | the rice I was eating / used to eat (ongoing, habitual, unfinished) |
| 먹었던 밥 | meogeotdeon bap | the rice I ate (that one time, now recalled — and done with) |
Use -았/었던 when the state is emphatically over — a house you lived in but left, a person who used to be something and no longer is:
예전에 살았던 동네에 오랜만에 가 봤어요.
yejeone saratdeon dongne-e oraenmane ga bwasseoyo
I visited the neighborhood I used to live in, for the first time in ages.
그때 같이 봤던 영화 기억나요?
geuttae gachi bwatdeon yeonghwa gieongnayo?
Do you remember the movie we watched together back then?
Why English speakers get this wrong
English collapses the whole system onto verb tense and aspect: the rice I ate vs the rice I was eating. Korean speakers feel these as two different endings on the modifier, not two forms of one verb. The trap is that beginners default to -(으)ㄴ for every past modifier, because it's the one they learned first — and so they say 마신 커피 (a finished cup) when they mean 마시던 커피 (the one they walked away from). The reverse trap is over-reaching for -던 on genuinely one-shot completed events (a graduation, a single purchase), where the neutral -(으)ㄴ is correct. Train your ear on the aspect, not the calendar: -던 is about how the past action is recalled (in progress, on repeat), not about how long ago it was.
Common Mistakes
1. Using completed -(으)ㄴ for an interrupted action. If the thing was left unfinished, it needs -던.
❌ 아까 먹은 과자 어디 갔지?
Wrong — 먹은 means you finished them; snacks you were still munching on are 먹던.
✅ 아까 먹던 과자 어디 갔지?
akka meokdeon gwaja eodi gatji?
Where did the snacks I was munching on go?
2. Using habitual -던 for a one-time completed event. A graduation happens once and is done — that's plain -(으)ㄴ.
❌ 작년에 졸업하던 학교에 다시 가 봤어요.
Wrong — graduation is a one-time completed event, so it takes -(으)ㄴ (졸업한), not the ongoing/habitual -던.
✅ 작년에 졸업한 학교에 다시 가 봤어요.
jangnyeone joreopan hakgyo-e dasi ga bwasseoyo
I went back to the school I graduated from last year.
3. Using plain -(으)ㄴ for a clearly habitual past. "Went every day" is a repeated routine — that's -던.
❌ 어렸을 때 매일 다닌 태권도장이 아직 있더라고요.
Wrong — 'went every day' is habitual, which wants -던 (다니던); plain 다닌 reads as a single completed visit.
✅ 어렸을 때 매일 다니던 태권도장이 아직 있더라고요.
eoryeosseul ttae maeil danideon taegwondojang-i ajik itdeoragoyo
The taekwondo studio I used to go to every day as a kid is still there.
4. Reaching for -(으)ㄴ when you mean "the book I was reading (and set down)." The completed 읽은 책 empties the shelf; the unfinished one is 읽던 책.
❌ 침대 옆에 읽은 책 좀 갖다 줄래요?
Wrong if you mean the book you had open — 읽은 책 is one you've finished; the one you left mid-read is 읽던 책.
✅ 침대 옆에 읽던 책 좀 갖다 줄래요?
chimdae yeope ikdeon chaek jom gatda jullaeyo?
Could you bring me the book I was reading, by the bed?
Key Takeaways
- -(으)ㄴ = completed past adnominal (먹은, 읽은, 간, 만든). The action is finished.
- -던 = retrospective imperfective — a witnessed past action recalled as ongoing, habitual, or interrupted (먹던, 마시던, 가던). Think English "was ~ing" / "used to."
- -았/었던 = completed but distinctly recalled / discontinued (살았던 집, 봤던 영화) — "that time, no longer."
- -던 attaches to any stem unchanged; -(으)ㄴ has vowel/ㄹ → -ㄴ vs consonant → -은 allomorphy.
- The contrast is aspectual, not chronological: 마신 커피 (emptied) vs 마시던 커피 (half-drunk), regardless of when.
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Start learning Korean→Related Topics
- -더-: The Retrospective / Evidential MarkerTOPIK 3 — The pre-final ending -더-, unique to Korean, reports something the speaker personally witnessed in the past and now recalls — 'as I saw / found.' Its hard evidential restriction and first-person limits are the seed of a whole family: -더라, -더라고요, -던, -더니, -던데.
- Absolute vs Relative Tense: Tense Inside Embedded ClausesTOPIK 3 — Main-clause tense is absolute — anchored to the moment you speak — but inside a relative or quotative clause, Korean tense is read relative to the main verb's time, which is why 'the baby crying earlier' uses the present -는, not the past.
- -았었/었었-: Discontinued / Remote Past vs Simple PastTOPIK 4 — The doubled marker -았었/었었- signals a past situation now cut off from the present — over, reversed, or no longer holding — and why it is NOT the English past perfect for mere anteriority.
- -던 vs -(으)ㄴ: Habitual/Interrupted vs Completed PastTOPIK 4 — Both modifier endings put a past action in front of a noun, but -(으)ㄴ files a finished one-off event while -던 recalls something habitual, ongoing, or broken off — the ending of memory.
- Recollected Past Relative Clauses: -던 and -았/었던TOPIK 3 — The retrospective attributives -던 and -았/었던 modify a noun with a REMEMBERED past: -던 for an action that was ongoing, habitual, or left unfinished (마시던 커피 'the coffee I was drinking'), -았/었던 for one clearly completed and now discontinued (갔던 곳 'a place I once went'). They add 'witnessed / interrupted / nostalgic' — nuance the plain -(으)ㄴ can't carry.